test_structure.js

it('returns an object containing all users', done => {
  const server = sinon.fakeServer.create()
  server.respondWith('GET', '/users', [
    200,
    { 'Content-Type': 'application/json' },
    '[{ "id": 1, "name": "Brian" },  { "id": 2, "name": "Ron" }]'
  ])
  Users.all()
    .done(collection => {
      const expectedCollection = [
        { id: 1, name: 'Brian' },
        { id: 2, name: 'Ron' }
      ]
      expect(collection.toJSON()).to.eql(expectedCollection)
      done()
    })

  server.respond()
  server.restore()
});